rumpuser_mem.c revision 1.1.6.2 1 /*
2 * Copyright (c) 2007-2010 Antti Kantee. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
14 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26 #include "rumpuser_port.h"
27
28 #if !defined(lint)
29 __RCSID("$NetBSD: rumpuser_mem.c,v 1.1.6.2 2014/08/20 00:02:21 tls Exp $");
30 #endif /* !lint */
31
32 #include <sys/mman.h>
33
34 #include <assert.h>
35 #include <errno.h>
36 #include <stdint.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39
40 #include <rump/rumpuser.h>
41
42 #include "rumpuser_int.h"
43
44 int
45 rumpuser_malloc(size_t howmuch, int alignment, void **memp)
46 {
47 void *mem = NULL;
48 int rv;
49
50 if (alignment == 0)
51 alignment = sizeof(void *);
52
53 rv = posix_memalign(&mem, (size_t)alignment, howmuch);
54 if (__predict_false(rv != 0)) {
55 if (rv == EINVAL) {
56 printf("rumpuser_malloc: invalid alignment %d\n",
57 alignment);
58 abort();
59 }
60 }
61
62 *memp = mem;
63 ET(rv);
64 }
65
66 /*ARGSUSED1*/
67 void
68 rumpuser_free(void *ptr, size_t size)
69 {
70
71 free(ptr);
72 }
73
74 int
75 rumpuser_anonmmap(void *prefaddr, size_t size, int alignbit,
76 int exec, void **memp)
77 {
78 void *mem;
79 int prot, rv;
80
81 #ifndef MAP_ALIGNED
82 #define MAP_ALIGNED(a) 0
83 if (alignbit)
84 fprintf(stderr, "rumpuser_anonmmap: warning, requested "
85 "alignment not supported by hypervisor\n");
86 #endif
87
88 prot = PROT_READ|PROT_WRITE;
89 if (exec)
90 prot |= PROT_EXEC;
91 mem = mmap(prefaddr, size, prot,
92 MAP_PRIVATE | MAP_ANON | MAP_ALIGNED(alignbit), -1, 0);
93 if (mem == MAP_FAILED) {
94 rv = errno;
95 } else {
96 *memp = mem;
97 rv = 0;
98 }
99
100 ET(rv);
101 }
102
103 void
104 rumpuser_unmap(void *addr, size_t len)
105 {
106
107 munmap(addr, len);
108 }
109
110